@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=Space+Grotesk:wght@500;600;700&display=swap");

/* ============================================================================
   Mobile-first CSS for LOI landing page (T022)
   WCAG AA compliant: contrast ratios, focus indicators, readable text
   ============================================================================ */

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Colors from design tokens */
  --color-primary: #0066ff;
  --color-primary-dark: #0052cc;
  --color-primary-light: #3385ff;
  --color-success: #22c55e;
  --color-success-light: #dcfce7;
  --color-error: #ef4444;
  --color-error-light: #fee2e2;
  --color-warning: #f59e0b;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-900: #111827;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-sans: "IBM Plex Sans", "Space Grotesk", -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", "IBM Plex Sans", -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
/* ============================================================================
   Header with Logo & Language Switcher
   ============================================================================ */

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 75rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo {
  font-size: var(--font-size-2xl);
  line-height: 1;
}

.company-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  letter-spacing: -0.02em;
  font-family: var(--font-display);
}

.language-switch {
  display: flex;
  gap: var(--spacing-xs);
}

.site-header .language-switch {
  display: flex;
  gap: var(--spacing-xs);
}

.site-header .lang-button {
  background-color: transparent;
  color: var(--color-gray-700);
  border: 2px solid var(--color-gray-300);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.site-header .lang-button:hover {
  border-color: var(--color-gray-400);
  background-color: var(--color-gray-50);
}

.site-header .lang-button[aria-current="true"] {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.site-header .lang-button:focus {
  outline: 3px solid rgba(0, 102, 255, 0.3);
  outline-offset: 2px;
}
/* ============================================================================
   Hero Section
   ============================================================================ */

.hero {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  color: #ffffff;
  padding: var(--spacing-2xl) var(--spacing-lg);
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  width: 100%;
  max-width: 75rem;
}

.hero-content {
  max-width: 42rem;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-family: var(--font-display);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--spacing-sm);
}

.hero-visual {
  position: relative;
  min-height: 16rem;
  border-radius: 1.5rem;
  background: radial-gradient(
      circle at 20% 20%,
      rgba(255, 255, 255, 0.25),
      transparent 60%
    ),
    rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: 0.6;
  mix-blend-mode: screen;
}

.hero-visual::before {
  width: 12rem;
  height: 12rem;
  background: radial-gradient(circle, #ffffff, rgba(255, 255, 255, 0));
  top: -3rem;
  right: -2rem;
}

.hero-visual::after {
  width: 10rem;
  height: 10rem;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.7),
    rgba(255, 255, 255, 0)
  );
  bottom: -4rem;
  left: -2rem;
}

.hero-orbits {
  position: absolute;
  inset: 1rem;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
}

.hero-stat-card {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  width: min(16rem, 80%);
  text-align: left;
  box-shadow: var(--shadow-lg);
}

.hero-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  font-family: var(--font-display);
  line-height: 1;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.8);
}

.cta-button {
  background-color: #ffffff;
  color: var(--color-primary);
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-lg);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -5px rgba(0, 0, 0, 0.2);
}

.cta-button:focus {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.cta-button:active {
  transform: translateY(0);
}

/* ============================================================================
   Trust Section
   ============================================================================ */

.trust-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background-color: var(--color-gray-50);
}

.trust-section h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--color-gray-900);
}

.trust-bullets {
  list-style: none;
  max-width: 42rem;
  margin: 0 auto;
}

.trust-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.trust-icon {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-success-light);
  color: var(--color-success);
  border-radius: 50%;
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.trust-text h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray-900);
}

.trust-text p {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
}

/* ============================================================================
   Form Section
   ============================================================================ */

.loi-form-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background-color: #ffffff;
}

.form-container {
  max-width: 42rem;
  margin: 0 auto;
}

.form-container h2 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-900);
}

.form-intro {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

/* Banner Messages */
.banner {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-xl);
  align-items: flex-start;
}

.banner-success {
  background-color: var(--color-success-light);
  border-left: 4px solid var(--color-success);
}

.banner-error {
  background-color: var(--color-error-light);
  border-left: 4px solid var(--color-error);
}

.banner-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.banner-success .banner-icon {
  color: var(--color-success);
}

.banner-error .banner-icon {
  color: var(--color-error);
}

.banner-content {
  flex: 1;
}

.banner-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray-900);
}

.banner-message {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
}

/* Form Fields */
.form-field {
  margin-bottom: var(--spacing-lg);
}

.form-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.form-grid.two-column {
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray-900);
  font-size: var(--font-size-base);
}

.required {
  color: var(--color-error);
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: #ffffff;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-field input.error,
.form-field textarea.error {
  border-color: var(--color-error);
}

.form-field input.error:focus,
.form-field textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-field textarea {
  resize: vertical;
  min-height: 6rem;
}

/* Field Errors */
.field-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  min-height: 1.25rem;
}

/* Checkboxes */
.form-checkbox {
  margin-bottom: var(--spacing-lg);
}

.checkbox-label {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
  cursor: pointer;
  font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
  flex-shrink: 0;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-gray-300);
}

.checkbox-label input[type="checkbox"]:focus {
  outline: 3px solid rgba(0, 102, 255, 0.3);
  outline-offset: 2px;
}

/* Privacy Note */
.privacy-note {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  padding: var(--spacing-md);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

/* Submit Button */
.submit-button {
  width: 100%;
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.submit-button:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.submit-button:focus {
  outline: 3px solid rgba(0, 102, 255, 0.3);
  outline-offset: 2px;
}

.submit-button:active {
  transform: translateY(0);
}

.submit-button:disabled {
  background-color: var(--color-gray-300);
  cursor: not-allowed;
  transform: none;
}

/* Loading State */
.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  color: var(--color-gray-600);
  font-size: var(--font-size-base);
}

.hidden {
  display: none !important;
}

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================================================
   Footer
   ============================================================================ */

.footer {
  padding: var(--spacing-xl) var(--spacing-lg);
  background-color: var(--color-gray-900);
  color: #ffffff;
  text-align: center;
  margin-top: auto;
}

.footer p {
  font-size: var(--font-size-sm);
}

/* ============================================================================
   Tablet & Desktop (min-width: 768px)
   ============================================================================ */

@media (min-width: 768px) {
  .hero {
    padding: var(--spacing-2xl) var(--spacing-xl);
    min-height: 70vh;
  }

  .hero-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
  }

  .hero-content {
    text-align: left;
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .trust-bullets {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .trust-item:last-child:nth-child(odd) {
    grid-column: span 2;
  }

  .loi-form-section {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
}

/* ============================================================================
   Accessibility Utilities
   ============================================================================ */

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}